OEM stands for original equipment manufacturer. The Oxygen sensor senses amounts of oxygen in the exuast to adjust the fuel mixture acordingly.
Yes
The cam sensor should be located underneathe your distributor cap. That is the placement on my 98 Grand Cherokee and it should be located there as well on yours.
The 1994 Jeep Grand Cherokee IAT sensor can be found attached to the air intake hose. The IAT sensor will be near the air filter box.
sensor is in the plastic reserve on the float.
It goes into the top of bell housing.
Yes
Yes
Cherokee Laredo, no. Grand Cherokee Laredo, yes.
The diagnostic code 12 51 55 is actually not a code for the 1994 Jeep Grand Cherokee Laredo. The 12 means that it has started searching for codes. The 51 is oxygen sensor stuck lean. The 55 means it is finished searching for codes. Getting this means nothing is wrong.
No, the Grand is different from the Cherokee.
Yes
look it up